[issue34933] json.dumps serializes double quotes incorrectly

[Juozas Masiulis]

New submission from Juozas Masiulis <compositum at gmail.com>:

currently python behaves like this:
>>> import json
>>> a={'a': '//a[@asdf="asdf"]'}
>>> json.dumps(a)
'{"a": "//a[@asdf=\\"asdf\\"]"}'

this behaviour is incorrect.

the resulting string should be '{"a": "//a[@asdf=\"asdf\"]"}'

The difference is that double quotes inside double quotes are escaped twice instead of once. 

compare it to behaviour in javascript:

> var a = {'a': '//a[@asdf="asdf"]'}
undefined

JSON.stringify(a)
"{"a":"//a[@asdf=\"asdf\"]"}"

----------
messages: 327352
nosy: Juozas.Masiulis
priority: normal
severity: normal
status: open
title: json.dumps serializes double quotes incorrectly
type: behavior
versions: Python 2.7, Python 3.6

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34933>
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